﻿<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>混合布局</title>
<style>
	*{ margin:0; padding:0; font-size:40px; color:white; }
	#top{ width:100%; height:150px; background:red; }
	#topContent{ width:300px; height:150px; background:blue; 
		margin:0 auto; }
</style>
</head>
<body>
<div id="top">
	<div id="topContent">头部内容</div>
</div>
</body>
</html>
